Make cargo check work in the top directory

README.md

@@ -0,0 +1,34 @@
+A DIY split keyboard.
+
+## Directory
+
+### `/lib`
+A rust library, and the bulk of the keyboard firmware implementation.
+Written using the Embassy framework.
+
+### `/left` and `/right`
+Rust binaries, one for each half of the split keyboard.
+Most of the actual logic is implemented in `/lib`.
+
+### `/schematic`
+Kicad schematics of the keyboard PCBs.
+
+### `/case`
+3d-printable files of the keyboard case and related plastics.
+
+### `/editor`
+A graphical program for configuring the keyboard layout. Work in progress.
+
+
+## Developing
+
+Required tools:
+- Rust, obviously.
+- `probe-rs` for flashing the firmware. Follow instructions at https://probe.rs/
+- [`flip-link`](https://github.com/knurling-rs/flip-link/)
+- A debug probe of some kind, I recommend a [Pitaya-Link](https://github.com/makerdiary/pitaya-link)
+
+To flash:
+- plug in the probe,
+- `cd` into either `left` or `right`
+- `cargo run`

editor/README.md

@@ -1,3 +0,0 @@
-# tgnt
-
-Keyboard configuration library and editor.

left/Cargo.toml

@@ -9,7 +9,7 @@ edition = "2021"
 path = "../lib"
 package = "tangentbord1-lib"
 
-[dependencies]
+[target.thumbv6m-none-eabi.dependencies]
 cortex-m-rt = "0.7"
 embassy-rp = { version = "0.1.0", features = ["time-driver", "critical-section-impl"] }
 embassy-executor = { version = "0.5.0", features = ["nightly", "executor-thread", "integrated-timers", "arch-cortex-m"] }

left/src/main.rs

@@ -1,9 +1,10 @@
 //! Firmware for Tangentbord1, left half.
 
-#![no_std]
+// NOTE: the order of attributes matters here..
 #![no_main]
+#![cfg(target_os = "none")] // only try to compile this for embedded
+#![no_std]
 #![feature(type_alias_impl_trait)]
-#![cfg(target_arch = "arm")]
 
 extern crate alloc;
 extern crate cortex_m_rt;

right/Cargo.toml

@@ -9,7 +9,7 @@ edition = "2021"
 path = "../lib"
 package = "tangentbord1-lib"
 
-[dependencies]
+[target.thumbv6m-none-eabi.dependencies]
 cortex-m-rt = "0.7"
 embassy-rp = { version = "0.1.0", features = ["time-driver", "critical-section-impl"] }
 embassy-executor = { version = "0.5.0", features = ["nightly", "executor-thread", "integrated-timers", "arch-cortex-m"] }

right/src/main.rs

@@ -1,7 +1,9 @@
 //! Firmware for Tangentbord1, right half.
 
-#![no_std]
+// NOTE: the order of attributes matters here..
 #![no_main]
+#![cfg(target_os = "none")] // only try to compile this for embedded
+#![no_std]
 #![feature(type_alias_impl_trait)]
 
 extern crate alloc;